Dog age method
The calculator uses a common dog-age estimate: the first year is about 15 human years, the second year reaches about 24, and later years increase faster for larger dogs.
Animal age
Dog Age Calculator
Estimate a dog's age in human years using age and size-based rules.
Why size matters
Small dogs and giant dogs often age at different rates in adulthood. This calculator adjusts the estimate by size, but breed, health, diet, and veterinary history can all change the real picture.
Browse Animal Age Calculators
Animal Age Calculators overview
Compare animal ages with familiar human-age equivalents using simple life-stage rules.
View category hubRelated age calculators
Estimate dog age
Convert dog years and months into an estimated human-age equivalent.
Estimated human age
24 years
2 years, 0 months
Dog age
Medium dog
Size
15, 24, then size-based
Method